/*---------------------------------------------------------------------------*\
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    \\  /    A nd           | Copyright (C) 2011-2012 OpenFOAM Foundation
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-------------------------------------------------------------------------------
License
    This file is part of OpenFOAM.

    OpenFOAM is free software: you can redistribute it and/or modify it
    under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

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    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
    FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
    for more details.

    You should have received a copy of the GNU General Public License
    along with OpenFOAM.  If not, see <http://www.gnu.org/licenses/>.

Class
    Foam::incompressible::RASModels::LienCubicKE

Group
    grpIcoRASTurbulence

Description
    Lien cubic non-linear k-epsilon turbulence model for incompressible flows.

SourceFiles
    LienCubicKE.C

\*---------------------------------------------------------------------------*/

#ifndef LienCubicKE_H
#define LienCubicKE_H

#include "RASModel.H"

// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

namespace Foam
{
namespace incompressible
{
namespace RASModels
{

/*---------------------------------------------------------------------------*\
                           Class LienCubicKE Declaration
\*---------------------------------------------------------------------------*/

class LienCubicKE
:
    public RASModel
{

protected:

    // Protected data

        // Model coefficients

            dimensionedScalar C1_;
            dimensionedScalar C2_;
            dimensionedScalar sigmak_;
            dimensionedScalar sigmaEps_;
            dimensionedScalar A1_;
            dimensionedScalar A2_;
            dimensionedScalar Ctau1_;
            dimensionedScalar Ctau2_;
            dimensionedScalar Ctau3_;
            dimensionedScalar alphaKsi_;


        // Fields

            volScalarField k_;
            volScalarField epsilon_;

            volScalarField eta_;
            volScalarField ksi_;
            volScalarField Cmu_;
            volScalarField fEta_;
            volScalarField C5viscosity_;

            volScalarField nut_;

            volSymmTensorField nonlinearStress_;


public:

    //- Runtime type information
    TypeName("LienCubicKE");

    // Constructors

        //- Construct from components
        LienCubicKE
        (
            const volVectorField& U,
            const surfaceScalarField& phi,
            transportModel& transport,
            const word& turbulenceModelName = turbulenceModel::typeName,
            const word& modelName = typeName
        );


    //- Destructor
    virtual ~LienCubicKE()
    {}


    // Member Functions

        //- Return the turbulence viscosity
        virtual tmp<volScalarField> nut() const
        {
            return nut_;
        }

        //- Return the effective diffusivity for k
        tmp<volScalarField> DkEff() const
        {
            return tmp<volScalarField>
            (
                new volScalarField("DkEff", nut_/sigmak_ + nu())
            );
        }

        //- Return the effective diffusivity for epsilon
        tmp<volScalarField> DepsilonEff() const
        {
            return tmp<volScalarField>
            (
                new volScalarField("DepsilonEff", nut_/sigmaEps_ + nu())
            );
        }

        //- Return the turbulence kinetic energy
        virtual tmp<volScalarField> k() const
        {
            return k_;
        }

        //- Return the turbulence kinetic energy dissipation rate
        virtual tmp<volScalarField> epsilon() const
        {
            return epsilon_;
        }

        //- Return the Reynolds stress tensor
        virtual tmp<volSymmTensorField> R() const;

        //- Return the effective stress tensor including the laminar stress
        virtual tmp<volSymmTensorField> devReff() const;

        //- Return the source term for the momentum equation
        virtual tmp<fvVectorMatrix> divDevReff(volVectorField& U) const;

        //- Return the source term for the momentum equation
        virtual tmp<fvVectorMatrix> divDevRhoReff
        (
            const volScalarField& rho,
            volVectorField& U
        ) const;

        //- Solve the turbulence equations and correct the turbulence viscosity
        virtual void correct();

        //- Read RASProperties dictionary
        virtual bool read();
};


// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

} // End namespace RASModels
} // End namespace incompressible
} // End namespace Foam

// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

#endif

// ************************************************************************* //
